The official word won’t come for another two weeks, but St. John’s should be celebrating on Selection Sunday.

After four years of waiting and four years of wondering, the senior-led Red Storm likely clinched an NCAA Tournament berth after defeating rival Georgetown, 81-70, in their final home game of the season on Saturday afternoon at Madison Square Garden, avenging a 22-point loss to the Hoyas 11 days prior.

Winning for the sixth time in the past seven games, St. John’s (20-9, 9-7 Big East) closes the regular season with road games at Marquette and Villanova — followed by the Big East Tournament — and should be safe even if it doesn’t win another game, though one more win would erase any sliver of doubt and allow Steve Lavin’s first recruiting class to reach the Big Dance for the first time, which would be the second appearance by the school in 13 years.

“Hopefully the [committee] will put us in,” said senior Sir’Dominic Pointer, biting his tongue until seeing the team in the bracket. “I feel like it’s right there.”

St. John’s got there by being a team it never could be during the past three seasons, succeeding while star guard D’Angelo Harrison struggled. Harrison — the third-leading scorer in school history — enjoyed 25 seconds of his final home game before being benched with two fouls and finished with a career-low one point, but St. John’s looked as strong as ever with a balanced and experienced attack unfazed by the early loss of its leader.

Pointer had 24 points (tying a career high), seven rebounds and several well-deserved rounds of “MVP” chants, while Phil Greene IV scored a career-high 26 points, hitting 6-of-7 from 3-point range to snap a three-game winning streak by Georgetown (18-9, 10-6) and clinch a first-round bye in the Big East Tournament.

“I feel like when my team needs me, I need to come through,” said Greene, who added seven rebounds.

“We had to pick it up, so we came out aggressive. Everyone was aggressive.”

Having slowed the Johnnies to their second-lowest scoring total of the season less than two weeks ago, Georgetown couldn’t compete with the Red Storm’s speed on either end of the floor, falling behind, 43-32, at halftime.

Allowing D’Vauntes Smith-Rivera (29) to score, while shutting down everyone else, St. John’s held the Hoyas below 38-percent shooting from the field and finished off its favorite foe with ease, never letting the lead slip to single digits in the second half.

The only downside of the entire afternoon came with eight minutes remaining, as Jamal Branch suffered a right hip flexor and left the game. He will undergo tests on Sunday.

“It was a complete reversal,” St. John’s coach Steve Lavin said, comparing to the previous meeting with Georgetown. “We slugged them from start to finish. … Our group is just a group that keeps getting better.”

Pointer, more than any player, has epitomized the team’s growth, playing up to the potential that was always there, potential his teammates shared and refused to squander.

As the final seconds sprinted down, St. John’s received a standing ovation and chants of “Thank you, seniors,” recognition of a long and trying journey that will make the destination so much sweeter.

“From freshman year when we had no shot to sophomore year when we had a better shot to junior year when we were one game away, now, we’re just waiting for Selection Sunday,” Pointer said. “Once we get in, it’ll feel great.”